Community college tuition: In an ABC News/Washington Post Poll in January 2015, 1,003 adults nationwide answered the following question, “Obama has proposed providing free tuition to attend community...



Community college tuition: In an ABC News/Washington Post Poll in January 2015, 1,003 adults nationwide answered the following question, “Obama has proposed providing free tuition to attend community colleges at a cost to the federal government of sixty billion dollars over 10 years. Do you support or oppose this proposal?” 53% supported the proposal with a margin of error of 3.5% at a 95% level of confidence.


http://www.washingtonpost.com/politics/polling/washington-postabc-news-poll-january-1215/2015/01/22/9eba07b0-9f19-11e4-91fc-7dff95a14458_page.html


Which of the following statements is correct about the 95% confidence interval?




  1.  We are 95% confident that between 46% and 60% of all adults nationwide will support the free community college tuition proposal.

  2.  We are 95% confident that between 49.5% and 56.5% of all adults nationwide will support the free community college tuition proposal.

  3.  We are 95% confident that 53% of the 1,003 adults in the sample will support the free community college tuition proposal.

  4.  We are confident that 95% of the 1,003 adults in the sample will support the free community college tuition proposal.




Jun 09, 2022
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